We examined the effects of a stressful training course exercise on soldiers stress hormone (cortisol levels), subjective workload and grammatical reasoning. Saliva samples, Baddeley 3-minute reasoning test and NASA-TLX workload assessment were collected 10 minutes before the course (PRE measurement), immediately after the course (POST measurement) and 12 and 20 minutes after the course (Recovery 1 and Recovery 2 measurements). Workload was lowest in PPE-measurement, highest in POST-measurement immediately after the course and declined near to the PRE level during the recovery measurements. The levels of cortisol concentrations and grammatical reasoning test scores followed the same trend.
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